> When using the Rebuilder, if I set the source path to c:\mame\roms and the
> destination path to c:\mame\roms\rebuilt, CMP won't let me do this, because "the
> destination folder can't be a sub-path of a the source folder".
>
> What I am asking for is an option to ignore this, or turn it off.
>

Turn off 'scan subfolders' and it should work. ...or use drag&drop.

Roman Scherzer
ClrMamePro